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Combine mean and categoricality across reader threads

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This commit is contained in:
Erica Fischer
2023-02-09 10:39:30 -08:00
parent fba86ebe24
commit 8264b4096a
1 changed files with 13 additions and 0 deletions
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mbtiles.cpp
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@@ -850,6 +850,19 @@ std::map<std::string, layermap_entry> merge_layermaps(std::vector<std::map<std::
if (fk->second.max > fk2->second.max) {
fk2->second.max = fk->second.max;
}
fk2->second.xsum += fk->second.xsum;
fk2->second.ysum += fk->second.ysum;
fk2->second.count += fk->second.count;
if (fk->second.numeric_count + fk2->second.numeric_count > 0) {
fk2->second.mean = (
fk2->second.mean * fk2->second.numeric_count +
fk->second.mean * fk->second.numeric_count
) / (fk2->second.numeric_count + fk->second.numeric_count);
fk2->second.numeric_count += fk->second.numeric_count;
}
}
}